diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 52f9d48..c7730bf 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -19,7 +19,7 @@ jobs:
     name: Unit Tests
     strategy:
       matrix:
-        python_version: [3.7, 3.8, 3.9, "3.10"]
+        python_version: [3.8, 3.9, "3.10", "3.11"]
         os: [ ubuntu-latest, windows-latest, macos-latest ]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/requirements.txt b/requirements.txt
index 6b17292..928656f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # Build dependencies
 pytest
-pillow>=6.2.0,<10.0.0
+Pillow==10.1.0
 numpy>=1.16.4
 pandas>=0.24.2
 pyshp==2.1.0
diff --git a/swmmio/graphics/drawing.py b/swmmio/graphics/drawing.py
index 3721312..10fc9fb 100644
--- a/swmmio/graphics/drawing.py
+++ b/swmmio/graphics/drawing.py
@@ -217,8 +217,7 @@ def annotate_timestamp(draw):
     fnt = ImageFont.truetype(FONT_PATH, int(20 * scale))
 
     timestamp = strftime("%b-%d-%Y %H:%M:%S")
-    txt_height = draw.textsize(timestamp, fnt)[1]
-    txt_width = draw.textsize(timestamp, fnt)[0]
+    txt_width = draw.textlength(timestamp, fnt)
     xy = (size[0] - txt_width - 10, 15)
     draw.text(xy, timestamp, fill=grey, font=fnt)
 
@@ -228,7 +227,8 @@ def annotate_details(txt, draw):
     scale = 1 * size[0] / 2048
     fnt = ImageFont.truetype(FONT_PATH, int(20 * scale))
 
-    txt_height = draw.textsize(txt, fnt)[1]
+    _, top, _, bottom = draw.textbbox((0, 0), txt, fnt)
+    txt_height = top - bottom
 
     draw.text((10, size[1] - txt_height - 10),
               txt, fill=black, font=fnt)
diff --git a/swmmio/graphics/utils.py b/swmmio/graphics/utils.py
index 70ddf95..915e27f 100644
--- a/swmmio/graphics/utils.py
+++ b/swmmio/graphics/utils.py
@@ -10,7 +10,7 @@ def save_image(img, img_path, antialias=True, auto_open=False):
     imgSize = (img.getbbox()[2], img.getbbox()[3])
     if antialias:
         size = (int(imgSize[0] * 0.5), int(imgSize[1] * 0.5))
-        img.thumbnail(size, Image.ANTIALIAS)
+        img.thumbnail(size, Image.LANCZOS)
 
     img.save(img_path)
     if auto_open: